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UNITED STATES PATENT OFFICE.

JAMES CRAWFORD PGH, OF ASHTON, DAKOTA TERRIQORY.

y PLowsHARE.

I SPECIFICATION forming part of Letters Patent No. 302,027, dated July 15, 1884.

Application led April 21, 1884. (No model.)

struction are the following: The 'share may be sharpened without the expense of time and To @ZZ whom, t may concern.: f Be itknown that I, JAMES CRAWFORD PUGH, of Ashton, in the county of Spink and Terri- -tory of Dakota, have invented a new and useful Improvement in Plowshares, of which the following is arfull, clear,-and exact description, reference being had to the annexed drawings, forming part of this specification.

This invention consists of a plowshare formed with an adjustable plate which constitutes the cutting-edge of the plowshare, as hereinafter I described and claimed.

In the drawings, Figure 1 is a front view of my improved plowshare. Fig. 2 is a bottom view of the same. Fig. 3 is a section-of the same on line x of Fig. 1,' and Fig. 4 is a sec-l tion on line y y of Fig. I.

A indicates the body oftheplowshare,which has the form of an ordinary plowshare, and B is a thin steel plate bolted to the front side of said body, with its lower edge projecting bej low the lower edge thereof to form the cutting,-

edge and point ofthe plowshare. The body A is formed with oblique slots C, through Vwhich the bolts D are passed for securing the yplate in an adjustable manner, to adapt the same to be let down from time to time as the edge wears off. The plate being thin, no sharpening of the edge will be required. The part E of the plate is made thicker than the rest of it, to give the required strength for the point F. The plate' is made plane, and is to be drawn into contact with the concave surface Gofthe body A by the bolts D and nuts H, to formv close joints between the upper and lower edges of the plate and body. The plate may be made slightly -thicker at the center yI than at the edges, to facilitate the fitting of the plate on the concave surface of thebody. The side edges, J and K, ofthe plate are cut parallel, or nearly so, with each other, so that as the plate is adjusted downward after being worn off the edge and having the edge hammered to make it thin. Owing to the shape of the plate B, the

not be done where the edge of. the share wears off and is hammered to make it sharp again, as in the usual form of plowshare,

Io construction, also, the edgeof the share is kept L, which cannot be done in a plowshare where the edge-forming part is not adjustable with respect to said, bar. Again, less steel is required ,in making the plowshare, since the body B may be made of iron, and the temper of the steel will not be drawn as in ordinary hammering to sharpen them.

The cutting-edge will ordinarily be about one-sixteenth of an inch thick, while the plate at the middle will 'be above one-eighth of an `inch thick, and thepart thereof forming the point and shin will also be thicker thanl the main partto give the required strength. The upper edge of the plate will be quite thin, so as not .toform a projection on the body B, which will gather soil on the mold-board.

land-will require heavier cutting-edges than that above indicated, and such edges may be 1'iled,lif desired. ,j

I am aware that adj nstable plates for forming the cutting-edges of plows have been used broadly.

Vhat I cla-im is-f A plate for forming the cuttingedge of a plowshare, having its longitudinal center and landside edge made thicker than its main part, substantially as shown and described. JAMES ,CRAVFORD PUGH.

formed thereby shallV always be of uniform Vitnesses: length. STEPHEN GALHOON, Some of the advantages of the kabove con- S. l?. WATKINs.

labor required in taking it to a blacksmith` original width of cutis maintained, which canj With this.

on a level with the bottom of the landside-bar prior to my invention, and I do not claim such,

shares, which require repeated heating and Some kinds ofV land#such as stony or gravel 

